It’s made from paper and powered by 2 RPM engine (rotations per minute). So the first gear step is a 1:2 reduction making the first gear turn at the same pace as a seconds hand. I never added a hand to that though. The next several gears are there to reduce the rotation to that of the minute hand (rotates 1:60 compared to the second hand). Then another couple of complicated parts to make the second hand and minute hand to be co-axial.
I would think that you need one that doesn’t sync with the power outlet frequency, unless the motor you have is 50 Hz and you are at 60 or vice versa. I am not electrical engineer, but frequency is nominal for the outlet supply, so having a standard frequency reference for your circuit is important.
We had some guys want to restore the giant 4 faced clock in our church bell tower. It had a cool central gearing mechanism that converted the one motor running at 60 cycles for all the movements. It hadn’t run for over thirty years. They got everything cleaned and aligned and back in action, including repainting the numbers. The thing doesn’t keep time well because the local power supply is so erratic.
Anything made of a GF is allowed in “Made On A Glowforge” - the rule for “everything else” is that if you are sharing settings for non-proofgrade materials, the thread should be in Beyond the Manual (edited to correct my mistake.)
You may be right, that it won’t be very accurate either, but it’ll be a lot more accurate than what I’ve got right now I’m getting a motor suitable for 50Hz at 230V, which is what we have here in Sweden.
Wiring 230V will be… interesting. I did study electrical engineering waaay back, so I have some notion of what I’m supposed to do…
Oh, one fun motor that’s easy to get is a microwave oven tray engine - they turn at a steady pace, but they go backwards every second startup. Imagine having to reboot your clock to make it go the right way. I’m tempted to get one just because. “Look, kids, looks we had a power outage, because the clock is running backwards!”.